<!doctype html>
<html>
  <head>
    <meta charset="utf-8">
    <title>插件名称</title>
    <script src="popup.js"></script>
    <style>
        .tips{
            width: 180px;
            /* height: 30px; */
            background-color: #fff;
            display: flex;
            justify-content: center;
            align-items: center;
            flex-flow: column;
            padding: 10px 0;
            box-sizing: border-box;
        }
       .tips span:nth-of-type(1){
            font-size: 18px;
            color: #000;
            font-weight: 600;
       }
    </style>
  </head>
  <body>
    <div class="tips">
        <span>in-feel</span>
        <span>Yearning for freedom</span>
    </div>
    <!-- <h1>in-feel</h1>
    <h5>Yearning for freedom</h5>
    <button id="checkPage">检查页面</button> -->
  </body>
</html>